## dwitter.net | parabola (320)

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`function u(t) {`
```} // 122/140 ```

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``` u(t) is called 60 times per second. t: Elapsed time in seconds. S: Shorthand for Math.sin. C: Shorthand for Math.cos. T: Shorthand for Math.tan. R: Function that generates rgba-strings, usage ex.: R(255, 255, 255, 0.5) c: A 1920x1080 canvas. x: A 2D context for that canvas. ```
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remix of d/24461 by u/farter

`function u(t) {`

```}// 137/140 ```

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`function u(t) {`

```}// 139/140 ```

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• some math diagram about triangles with rational angles.
• u/farter
better performance & smoother graphic but can't golf.... t?n=t+2|0:l=0;if(l<n){l=n;for(i=l;--i;)for(j=l;--j;)u=Math.PI/l,k=n-i-j,k>0&&(z=960/(1/T(u*i)+1/T(u*j)),r=48/l,x.fillRect(z-r,60+z/T(u*i)-r,r+r,r+r))}
• u/farter
this needs 3 secs wait. updated version at d/24464
• u/farter
for really nonrepeating drawing, only draw when i,j,k are coprime.
• u/joeytwiddle
`l=60*t|0` can speed it up (but don't leave it running too long)

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`function u(t) {`

```}// 139/140 ```

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```}// 139/140 ```

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• u/donbright
i let this run for a super long time and i loved it
• u/parabola
@donbright sorry it's too slow, trying to improve it :P

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• 00FF. More embedded bitmap fun :)
• u/iverjo
Cool!
• u/sfz
Going to take a three month sabbatical and figure out how this works.
• u/FireFly
Anything in particular that I should explain? It might help to draw the bits of the codepoints in the string literal on a piece of paper, as an 8×15 grid (15 chars, 8 bits per char). Ā is U+100, used to encode 0x00.
• u/sfz
Neat trick!

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remix of d/1868 by u/farter

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```}// 136/140 ```

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remix of d/1862 by u/farter

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• fixed initial field f=0, and saved 2 bytes according to FireFly's suggestion!

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`function u(t) {`
```}// 140/140 ```